Ben10 Hidden Letters is a Puzzle game on PFreeGames.com. You can play Ben10 Hidden Letters in your browser for free. The goal of the game is to find all the hidden letters as the game name Ben10 Hidden Letters shown. There are 10 letters in each level. You can enter to the next level only when you find all of them. The faster you find them, the higher score you get. Have fun! Control: Mouse to play.